Your ContentItem has been created???

I have created a creatable Custom ContentType with a Custom ContentPart that has an int column named WeekOfId. When creating a new instance WeekOfId defaults to 0. I cannot allow a 0 value in this column.

I painted this column with {Required, Range(1,999999) and this throws a non fatal exception which allows the type to be saved, so I check the WeekOfId value in the drive POST editor like this